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2008 NASCAR Tickets & NASCAR Schedule
7 DAY ARCHIVE
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LOOKING FOR PARITY
Though results of recent dynamometer tests showed greater parity between the Nationwide Series engines of Toyota and those of other manufacturers, NASCAR issued a technical bulletin Tuesday night informing teams of a rule change that will reduce Toyota's horsepower.
The effect of the change is to limit air flow to the engine, thereby reducing horsepower, by narrowing the diameters of holes in the tapered spacer NASCAR introduced into the series this year. Installed at the intake of an engine, the spacer functions as a restrictor plate. The smaller the holes in the spacer, the lower the horsepower.
Specifically, the rule change requires engines with a cylinder bore spacing of 4.470 inches or more to run a tapered spacer with four holes measuring 1.100 inches each in diameter, compared with the 1.125-inch holes previously required. Toyota engines currently are the only ones in use in the Nationwide Series that feature a cylinder bore spacing of 4.470 inches or more.
NASCAR's intent with the rule change is to balance competition. Toyota has won 14 of 21 Nationwide races this season, with cars fielded by Joe Gibbs Racing accounting for 13 victories. The No. 20 JGR Camry has won nine times, with four different drivers behind the wheel.
Toyota, which debuted in the Sprint Cup and Nationwide series simultaneously last season, has its new engine package in place in NASCAR's "Triple-A" league. Eventually, NASCAR expects Chevrolet, Ford and Dodge to follow suit and upgrade their engine packages in the Nationwide Series.
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